The earliest land plants lacked true roots. What may have enabled them the most to colonize land?
1. | Symbiotic associations with fungi |
2. | Prostrate thalloid body |
3. | Motile antherozoids capable of reaching the egg through water |
4. | Parasitic and saprophytic modes of nutrition |
Charophytes are the only living algae that share distinctive derived traits with land plants that other algae don’t. All the following will be examples of such derived traits except:
1. Rings of cellulose-synthesizing proteins
2. Structure of flagellated sperms
3. Formation of a phragmoplast
4. Presence of chlorophyll a and b
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
In the given diagram of the green alga Chara, the parts labeled A and B respectively are called :
1. Nucule and Globule
2. Globule and Nucule
3. Antheridium and Archegonium
4. Archegonium and Antheridium
In the life cycle of a moss, the sporphytic generation is represented by all the following except:
1. | Oospore | 2. | Spore |
3. | Sporogonium | 4. | Spore mother cell |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Identify the incorrectly matched row:
|
Character |
Gymnosperm |
Angiosperm |
1. |
Xylem |
Tracheids only |
Mainly vessels |
2. |
Pollination agency |
Water only |
Various |
3. |
Female gametophyte |
Relatively large with distinct Archegonia |
8-nucleate embryo sac |
4. |
Endosperm |
Haploid |
Triploid |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Aplanogametes [gametes that do not have flagella] are the special features of:
1. Spirogyra and Zygnema
2. Spirogyra and Vaucheria
3. Ulothrix and Zygnema
4. Chlamydomanas and Ulothrix
Match each item in column I with one in Column II and select the correct answer from the codes given below:
Green alga |
Feature |
A. Chlamydomanas |
a. Non motile colony |
B. Volvox |
b. Coenobium with two kinds of cells |
C. Hydrodictyon |
c. Palmella stage |
D. Spirogyra |
d. Spiral chloroplasts |
Codes:
A | B | C | D | |
1. | a | d | b | c |
2. | a | b | c | d |
3. | c | b | a | d |
4. | c | d | a | b |
The term ‘seaweeds’ is used to describe several macroscopic, multicellular marine algal species belonging to:
I. Chlorophyceae
II. Phaeophyceae
III. Rhodophyceae
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II and III |
The given pattern of life cycle will be seen in:
1. Spirogyra | 2. Fucus |
3. Ectocarpus | 4. Polysiphonia |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The given pattern of life cycle will be seen in:
1. Spirogyra | 2. Fucus |
3. Ectocarpus | 4. Polysiphonia |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.